Heat-resistant cast steels
Heat-resistant cast steels are cast ferrous alloys formulated for service at elevated temperatures, where resistance to softening and thermal degradation is important. They are used for furnace components, heat-treatment equipment and other high-temperature plant parts that require cast shapes and dependable mechanical performance during heating.
| Grade | Material no. | C | Si | Cr | Mn | P | S |
|---|---|---|---|---|---|---|---|
| SCH4 | — | 0.2 - 0.35 | 1 - 2.5 | 6 - 8 | 0.5 - 1 | max 0.04 | max 0.04 |
| SSC14A | — | max 0.08 | max 1.5 | 18 - 21 | max 1.5 | max 0.04 | max 0.04 |
| SCH11X | — | 0.3 - 0.5 | 1 - 2.5 | 25 - 28 | max 1.5 | max 0.04 | max 0.03 |
| SSC23 | — | max 0.07 | max 2 | 19 - 22 | max 2 | max 0.04 | max 0.04 |
| SCH13A | — | 0.25 - 0.5 | max 1.75 | 23 - 26 | max 2.5 | max 0.04 | max 0.04 |
| CF10SMnN | — | max 0.01 | 3.5 - 4.5 | 16 - 18 | 7 - 9 | max 0.06 | max 0.03 |
| SCH16 | — | 0.2 - 0.35 | max 2.5 | 13 - 17 | max 2 | max 0.04 | max 0.04 |
| GX30CrSi7 | 1.4710 | 0,20-0,35 | 1,00-2,50 | 6,00-8,00 | 0,50-1,00 | 0,035 | 0,03 |
| GX40CrSi13 | 1.4729 | 0,30-0,50 | 1,00-2,50 | 12,0-14,0 | ≤1,00 | 0,04 | 0,03 |
| GX40CrSi17 | 1.4740 | 0,30-0,50 | 1,00-2,50 | 16,0-19,0 | ≤1,00 | 0,04 | 0,03 |
| GX160CrSi18 | 1.4743 | 1,40-1,80 | 1,00-2,50 | 17,0-19,0 | ≤1,00 | 0,04 | 0,03 |
| GX40CrSi24 | 1.4745 | 0,30-0,50 | 1,00-2,50 | 23,0-26,0 | ≤1,00 | 0,04 | 0,03 |
| GX40CrSi28 | 1.4776 | 0,30-0,50 | 1,00-2,50 | 27,0-30,0 | ≤1,00 | 0,04 | 0,03 |
| GX130CrSi29 | 1.4777 | 1,20-1,40 | 1,00-2,50 | 27,0-30,0 | 0,50-1,00 | 0,035 | 0,03 |
| GX40CrNi24-5 | 1.4822 | 0,30-0,50 | 1,00-2,00 | 23,0-25,0 | ≤1,50 | 0,045 | 0,03 |
| GX40CrNiSi27-4 | 1.4823 | 0,30-0,50 | 1,00-2,50 | 25,0-28,0 | ≤1,50 | 0,04 | 0,03 |
| GX25CrNiSi18-9 | 1.4825 | 0,15-0,35 | 0,50-2,50 | 17,0-19,0 | ≤2,00 | 0,04 | 0,03 |
| GX40CrNiSi22-10 | 1.4826 | 0,30-0,50 | 1,00-2,50 | 21,0-23,0 | ≤2,00 | 0,04 | 0,03 |
| GX8CrNiNb19-10 | 1.4827 | ≤0,08 | ≤1,50 | 18,0-20,0 | ≤1,50 | 0,045 | 0,03 |
| GX25CrNiSi20-14 | 1.4832 | 0,15-0,35 | 0,50-2,50 | 19,0-21,0 | ≤2,00 | 0,04 | 0,03 |
| 1.4837 | 1.4837 | 0,30-0,50 | 1,00-2,50 | 24,0-27,0 | ≤2,00 | 0,04 | 0,03 |
| GX15CrNi25-20 | 1.4840 | 0,10-0,20 | 0,50-1,50 | 24,0-26,0 | 0,50-1,50 | 0,045 | 0,03 |
| GX40CrNiSi25-20 | 1.4848 | 0,30-0,50 | 1,00-2,50 | 24,0-27,0 | ≤2,00 | 0,04 | 0,03 |
| GX40NiCrSiNb38-19 | 1.4849 | 0,30-0,50 | 1,00-2,50 | 18,0-21,0 | ≤2,00 | 0,04 | 0,03 |
| GX40NiCrSiNb35-26 | 1.4852 | 0,30-0,50 | 1,00-2,50 | 24,0-27,0 | ≤2,00 | 0,04 | 0,03 |
| GX40CrNiSiNb24-24 | 1.4855 | 0,30-0,50 | 1,00-2,50 | 23,0-25,0 | ≤2,00 | 0,04 | 0,03 |
| GX40NiCrSi35-26 | 1.4857 | 0,30-0,50 | 1,00-2,50 | 24,0-27,0 | ≤2,00 | 0,04 | 0,03 |
| GX10NiCrSiNb32-20 | 1.4859 | 0,05-0,15 | 0,50-1,50 | 19,0-21,0 | ≤2,00 | 0,04 | 0,03 |
| 1.4865 | 1.4865 | 0,30-0,50 | 1,00-2,50 | 18,0-21,0 | ≤2,00 | 0,04 | 0,03 |
| G-CoCr28 | 2.4778 | 0,05-0,25 | 0,50-1,50 | 27,0-30,0 | ≤1,50 | 0,04 | 0,03 |
| G-CoCr28Nb | 2.4779 | 0,25-0,35 | 0,50-1,50 | 27,0-30,0 | 0,50-1,50 | — | — |
| G-NiCr28W | 2.4879 | 0,35-0,55 | 1,00-2,00 | 27,0-30,0 | ≤1,50 | 0,04 | 0,03 |
Standards covering this category
15Property ranges
12| Property | Unit | Min | Max | Grades |
|---|---|---|---|---|
| Rm | N/mm² | 150 | 590 | 53 |
| Re | N/mm² | 170 | 320 | 46 |
| A | % | 3 | 35 | 46 |
| A5 | % | 20 | 25 | 3 |
| Z | % | 25 | 28 | 3 |
| HB | — | 130 | 400 | 11 |
| rho | g/cm³ | 7 | 7.85 | 27 |
| E | GPa | 90 | 196 | 3 |
| alpha | 10^-6/K | 9 | 18.4 | 3 |
| lambda | W/(m·K) | 54 | 59 | 2 |
| cp | J/(kg·K) | 460 | 480 | 2 |
| rho_el | nΩ·m | 860 | 860 | 1 |
Derived from 53 grades in this category with a recorded value.
Composition range
14| Property | Unit | Min | Max | Grades |
|---|---|---|---|---|
| C | % | 0.01 | 1.8 | 80 |
| N | % | 0.08 | 0.18 | 2 |
| Si | % | 0.5 | 4.5 | 80 |
| P | % | 0.02 | 0.06 | 79 |
| S | % | 0.02 | 0.04 | 79 |
| Cr | % | 6 | 52 | 80 |
| Mn | % | 0.5 | 9 | 80 |
| Fe | % | 9.38 | 22.25 | 4 |
| Co | % | 14 | 52 | 5 |
| Ni | % | 0.5 | 69 | 78 |
| Cu | % | 0.5 | 4 | 2 |
| Nb | % | 0.5 | 2.5 | 11 |
| Mo | % | 0.15 | 3 | 69 |
| W | % | 2 | 6 | 4 |
Derived from 80 grades in this category with a recorded value.